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Cambridge International Examinations Cambridge International Advanced Subsidiary and Advanced Level CHEMISTRY 9701/12 Paper 1 Multiple Choice February/March 2016 1 hour Additional Materials: Multiple Choice Answer Sheet *4624495401 Soft clean eraser Soft pencil (type B or HB is recommended) Data Booklet READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples, paper clips, glue or correction fluid. * Write your name, Centre number and candidate number on the Answer Sheet in the spaces provided unless this has been done for you. DO NOT WRITE IN ANY BARCODES. There are forty questions on this paper. Answer all questions. For each question there are four possible answers A, B, C and D. Choose the one you consider correct and record your choice in soft pencil on the separate Answer Sheet. Read the instructions on the Answer Sheet very carefully. Each correct answer will score one mark. A mark will not be deducted for a wrong answer. Any rough working should be done in this booklet. Electronic calculators may be used. This document consists of 16 printed pages. IB16 03_9701_12/4RP © UCLES 2016 [Turn over 2 Section A For each question there are four possible answers, A, B, C, and D. Choose the one you consider to be correct. Use of the Data Booklet may be appropriate for some questions. 1 Which compound contains two different elements with identical oxidation states? A HCl O B Mg(OH)2 C Na2SO4 D NH4Cl 2 For the element sulfur, which pair of ionisation energies has the largest difference between them? A third and fourth ionisation energies B fourth and fifth ionisation energies C fifth and sixth ionisation energies D sixth and seventh ionisation energies 3 Which ion has both more electrons than protons and more protons than neutrons? 1 2 16 [H = 1H; D = 1 H; O = 8 O] – + – – A D B H3O C OD D OH 4 Which species contains the smallest number of electrons? A B3+ B Be2+ C H– D He+ © UCLES 2016 9701/12/F/M/16 3 5 Nitric oxide, NO, and bromine vapour react together according to the following equation. o –1 2NO(g) + Br2(g) → 2NOBr(g) ΔH = –23 kJ mol –1 The reaction has an activation energy of +5.4 kJ mol . What is the correct reaction pathway diagram for this reaction? A B E A enthalpy E enthalpy ΔH o / kJ mol–1 ΔH o A / kJ mol–1 extent of reaction extent of reaction C D E E A A enthalpy enthalpy / kJ mol–1 ΔH o / kJ mol–1 ΔH o extent of reaction extent of reaction 6 Which series shows molecules in order of increasing bond angle? A CH4 → BF3 → NH3 B H2O → CO2 → BF3 C NH3 → CH4 → CO2 D NH3 → CH4 → H2O 7 What is the volume of steam produced when 1.00 g of ice is heated to 323 °C at a pressure of 101 kPa? 3 3 3 3 A 0.27 dm B 1.3 dm C 2.7 dm D 48 dm © UCLES 2016 9701/12/F/M/16 [Turn over 4 8 Solid carbon dioxide, CO2, is similar to solid iodine, I2, in its structure and properties. Carbon is in Group 14. Silica, SiO2, is a Group 14 compound. Which statement about solid CO2 and solid SiO2 is correct? A Both solids exist in a lattice structure. B Both solids have a simple molecular structure. C Both solids have atoms joined by single covalent bonds. D Both solids change spontaneously to gas at s.t.p. 9 An article in a science magazine contains the following statement. ‘It is lighter than a feather, stronger than steel, yet incredibly flexible and more conductive than copper.’ Which form of carbon is being described? A buckminsterfullerene B diamond C graphene D graphite 10 Which equation has an enthalpy change of reaction which corresponds to the standard enthalpy change of atomisation of chlorine? 1 A C (g) → C (g) 2 l 2 l 1 B C (l) → C (g) 2 l 2 l C Cl 2(g) → 2Cl (g) D Cl 2(l) → 2Cl (g) 11 In an experiment, 2.00 mol of hydrogen and 3.00 mol of iodine were heated together in a sealed container and allowed to reach equilibrium at a fixed temperature. The container had a fixed 3 volume of 1.00 dm . At equilibrium, there were 2.40 mol of iodine present in the mixture. H2(g) + I2(g) 2HI(g) What is the value of the equilibrium constant, Kc? A 0.107 B 0.357 C 0.429 D 2.33 © UCLES 2016 9701/12/F/M/16 5 12 Consecutive elements X, Y and Z are in Period 3 of the Periodic Table. Element Y has the highest first ionisation energy and the lowest melting point of these three elements. What are the identities of X, Y and Z? A sodium, magnesium, aluminium B magnesium, aluminium, silicon C aluminium, silicon, phosphorus D silicon, phosphorus, sulfur 13 When dealing with a spillage of metallic sodium it is important that no toxic or flammable products are formed. Which material should be used if there is a spillage of metallic sodium? A dilute hydrochloric acid B ethanol C sand D water spray 14 Chlorine gas is widely used to treat contaminated water. Which species present in water when chlorine gas has been added is responsible for killing bacteria? – – – A Cl O2 B Cl C HCl D OCl 15 Which row of the table is correct? shape bonds present ammonia ammonium ammonia ammonium molecule ion molecule ion A pyramidal regular tetrahedral σ σ B pyramidal regular tetrahedral σ π C regular tetrahedral pyramidal σ σ D regular tetrahedral pyramidal π σ © UCLES 2016 9701/12/F/M/16 [Turn over 6 16 Hydrogen chloride gas and hydrogen iodide gas have different thermal stabilities. The difference is due to a difference in the energies of some of the covalent bonds that are involved in the decomposition. Which row identifies the more stable of the two compounds, and gives the correct explanation? identity of the more explanation for the thermally stable compound difference in stability A hydrogen chloride the Cl–Cl bond is stronger than the I–I bond B hydrogen chloride the H–Cl bond is stronger than the H–I bond C hydrogen iodide the Cl –Cl bond is stronger than the I–I bond D hydrogen iodide the H–Cl bond is stronger than the H–I bond 17 Ammonium sulfate, (NH4)2SO4, and ammonium nitrate, NH4NO3, are used as fertilisers. These salts have different percentages by mass of nitrogen. They have the same effect as each other on the pH of neutral soil. Which row is correct? higher percentage effect on pH of soil of nitrogen by mass A ammonium nitrate decrease B ammonium nitrate increase C ammonium sulfate decrease D ammonium sulfate increase 2+ 2+ 2– – − – 18 River water in a chalky agricultural area contains Ca , Mg , CO3 , HCO3 , Cl and NO3 ions. In a water treatment plant, such water is treated by adding a calculated quantity of calcium hydroxide. What will be precipitated from the river water following the addition of calcium hydroxide? A CaCl 2 B CaCO3 C Ca(NO3)2 D Mg(NO3)2 © UCLES 2016 9701/12/F/M/16 7 19 After black and white photographic film has been developed, unreacted silver bromide is removed by reaction with sodium thiosulfate. + – 3– AgBr + 2Na2S2O3 → 4Na + Br + [Ag(S2O3)2] What is the function of the thiosulfate ion? A to make the silver ions soluble B to oxidise the silver ions C to reduce the bromine D to reduce the silver ions 20 People who take statin drugs to control their blood cholesterol may also take ‘coenzyme Q10’. The diagram shows a simplified structure of one form of this coenzyme. O CH3O CH3O H O n coenzyme Q 10 Which row describes this structure correctly? number of π bonds the coenzyme is in one molecule A an aldehyde n + 2 B an aldehyde n + 4 C a ketone n + 2 D a ketone n + 4 © UCLES 2016 9701/12/F/M/16 [Turn over 8 21 Geraniol and nerol are compounds found in some flower fragrances. They are isomers of each other. CH3 CH3 C C CH2OH H H2C C H2C C H CH2OH H3C H2C H3C H2C CC CC H3C H H3C H geraniol nerol Which type of isomerism is shown here? A chain B geometrical (cis-trans) C optical D positional 22 A section showing two repeat units of an addition polymer is shown. CH3 CH3 CH3 CH3 C C C C Cl CH Cl CH 3 3 What is the identity of the monomer that produced this polymer? A 2-chloro-3-methylbutane B 2-chloro-3-methylbut-2-ene C 2-chloropent-2-ene D 2,4-dichloro-3,3,4,5-tetramethylhexane © UCLES 2016 9701/12/F/M/16 9 23 But-2-ene-1,4-diol is converted in two steps through an intermediate X into oxobutanedioic acid. step 1 step 2 X HOCH2CH=CHCH2OH HO2CCOCH2CO2H hot, acidified KMnO4 but-2-ene-1,4-diol oxobutanedioic acid What could be the reagent for step 1 and what is the intermediate X? reagent for step 1 X A cold, acidified KMnO4 HOCH2CH2CH(OH)CH2OH B hot, acidified K2Cr2O7 HO2CCH=CHCO2H C steam and concentrated H2SO4 HOCH2CH(OH)CH2CH2OH D warm, acidified K2Cr2O7 OHCCH(OH)CH2CHO 24 Hydrogen bromide can be added to T to give compound U. Compound U can be hydrolysed to compound V.